Plate-clamping device for printing-machines.



H. PEARCE, T. R 6. PARKER & R H. CARVERHILL. I PLATE CLAMPING DEVICE FOR PRINTING MACHINES.

APPLICATION FILED 0CT.3I. 1913.

2 SHEETSSHEET l.

' 67 @MQK I III Mm Nmy ZEWZZWM Patenfd Apr. 17,1917.

H. PEARCE, T. R. GMPARKER & R. H. CARVERHILL.

PLATE CLAMPING DEVICE FOR PRINTING MACHINES.

APPLICATION FILED OCT- 31,1913.

Patented Apr. 17, 1917.

2 SHEETS-SHEET 2.

HERBERT PEARCE, THOMAS ROBERT GILLETT PARKER, AND ROBERT HENRY CARVER- HILL, OF BROADI-IEATH, ENGLAND, ASSIGNORS TO THE DUPLEX PRINTING PRESS COMPANY, OF BATTLE CREEK, MICHIGAN, A CORPORATION OF MICHIGAN.

PLATE-CLAMPING DEVICE FOR PRINTING-MACHINES.

Specificati fers Patent. Patented Apr. 1'7, 191?;

Application filed October 31, 1913. Serial No. 798,472.

To all whom it may concern:

Be it known that we, HERBERT PEARCE, T-HOMAS'ROBERT GILLET'r PARKER, and Ron- ERT HENRY CARvnnHILL, subjects of the King of the United'Kingdom of Great Britain and Ireland, and residing at Linotype and Machinery Works, Broadheath, in the county of Chester, England, have invented new and useful Improvements in Plate-Clamping Devices for Printing-Machines, of which the following is a specification.

This invention relates to stereotype'plateclamping devices, particularly adapted for use in printing machines employing plates of tubular, orsubstantially tubular, form, which plates are placed upon, and removed from, the plate cylinder'by a longitudinal movement that is to say, a movement in the direction of the axis of the saidcylinder, such operations involving the necessity for withdrawing the plate-clamping jaws or dogs so that they shall not project beyond the periphery of the plate cylinder when the plate is being so moved on and ofi' the plate cylinder. The invention is not,.howev er, restricted to its application to the clamping of tubular or substantially tubular stereotype plates to their cylinders, as the principal features thereof may be applied to the clamping plates of semi-cylindrical or other curved form to their cylinders.

In the accompanying drawings: v

Figure 1 is a longitudinal sectional view of one end of a plate cylinder provided with one arrangement of plate-clamping devices 3 according to the present invention.

Fig. 2 is an end elevation of Fig. 1. Figs. 3 and 4 are views, respectively Slmllar to Figs. 1 and 2-, of a modification of the arrangement shown in the last-named figures.

Throughout the specification and drawings sim lar reference numerals are used to indicate like or corresponding parts.

The plate cylinder 1 is shown as provlded with an axial opening or bore extending outwardly through the trunnion thereof; and with radial slots 31 extending outwardly from the bore through the body of the cylinder 1 at points adjacent the outer end of the plate X when the latter is properly placed on the cylinder.

In each slot or recess 31 a plate clamping jaw or jaws 19 should be pivoted as by a stud 32, so that each jaw may swlng longitudinally of the cylinder in such slot. Each jaw 19 is provided with an inwardly-extending arm 34 engaging with a longitudinally movable actuating member lying within the bore. 1

As shown in Figs. 1 and 3 thearm 34 of one of the plate clamps or jaws 19 engages an annular groove 35 in a rod 36 movable longitudinallyin the axial bore in the cylin-.

der 1 and cylinder journal 11. The tighten-- mg and loosening of the'jaw 19, that is to 11 or other relatively fixed abutment.

The shape of the plate clamps or jaws 19 and arms 34, and the shape and size of the recesses or slots 31are such as will admit of the jaws being retracted wholly within those slots when a plate X is to be moved onto and ofi' the cylinder. If desired, a spring may be provided to act on the rod 36 so as to tend to move it inward relatively to the cylinder 1 'and therefore hold the nut or hand wheel 37 constantly in contact with the shaft 11; or the nut orhand wheel 37 may be attached to the end of the shaft 11 in such a manner that it can have no motion independent of the shaft 11 other than an bers. Thus the arm 34 of one jaw may be engaged with an annularly. grooved rod 36 as above described; and the arms 34 of the other jaws respectively engaged with a slot 38 in a sleeve 40 and with a slot 39 in a sleeve 41,-said sleeves beingconcentric with each other and with the rod 36 and adjustable independently thereof and of each, other in an axial direction by means of the respective hand wheels 37 and 37 as shown. The inwardly-extending arms 34 of the respective jaws 19 in such arrangement are of varying lengths as indicated for example in dotted lines in Fig. 1, according to whether they are engaged with the rod 36 or with the sleeve 40 or 41.

suitable abutment; and the wheel 37 similarly bears against the end of the sleeve 40, or other suitable abutment.

A cap 42 may be screwed on the boss of the hand wheel 37 to cover the end of the rod 36. This may or may not be provided according to particular requirements.

When it is desired to clamp a stereotype plate X on the plate cylinder 1, the jaws 19, by means of the proper rod 36, or sleeves 40 and ll, are swung back into the recesses or slots 31, as indicated in dotted lines in Figs. 1 and 3, so that/no part thereof will project beyond the periphery of the cylinder 1; and then the plate X can be moved axially onto or ofi of the said cylinder.

.After a plate X has been pushed to-its proper position on the cylinder 1, the proper jaw actuating members are operated(such as the reversing wheels 3'7, 37 -and 37") to move the rod 36, or sleeves 40 and 41, and swing thejaws 19 from the before-mentioned dotted position to approximately the position in which the respective jaws are shown in full lines in Figs. 1 and 3, and cause the jaws 19 to tightly grip the plate X.

When it is desired to remove the plate X from the cylinder 1, the jaws are swung back below the surface of thecylinder by operating the proper actuating member (such as the rod or sleeve) through one or other of the adjusting wheels 37, 37, 37", and after the jaws have been moved into the recesses or slots 31,as indicated in dotted lines in Figs. 1 and 2, so that no part of the jaws project beyond the periphery of the cylinder 1,the plate can be readilyremoved.

If desired, the cylinder may be provided with as many slots and clamping jaws as there are difierent sizes of stereotype plates to be clamped, but only the particular set of jaws 19 appropriate to the particular size of plate or plates to be clamped to the cylinder 1, will be. positioned and adapted to be operated at any one time. v'

- We claim 1. In combination with a cylinder having slots, and a longitudinal bore extending through the cylinder journal; of plate clamps in the slots, and a plurality of actuating members in said bore and respectively and independently operating difi'erent clamps.

2. In combination with a cylinder having slots and -a longitudinal bore extending through the cylinder journal; of plate clamps in said slots, and a plurality of independently adjustable concentrically arranged actuating members in said bore whereby said clamps may be independently adjusted.

3. In combination with a cylinder having radial slots and a longitudinal bore ing axially through the cylinder journal; of plate clamping jaws pivoted in said slots, and a plurality of independently adjustable concentrically arranged actuating members extending within said bore whereby the said dogs may be independently adjusted.

at. In combination with a cylinder having radial slots and a longitudinal bore ex l ing through the cylinder journal; of a clamps in the slots, a plurality of ind ently adjustable clamp actuating members in said bore, and adjusting devices for said members at their outer ends.

5. In combination with a cylinder having radial slots, and a longitudinal bore exte l ing through the cylinder journal; of plate clamps pivoted in the slots, a plurality of independently adjustable actuating members iii-said bore respectively engaging diii erent clamps, and actuating devices for said hers at the outer end of the journal.

6. In combination with a cylinder having radial slots and a longitudinal bore exteing axially through the cylinder journ plate clamps pivoted in the slots, a plurality of concentrically arranged independently adjustable actuating members in said bore whereby the said clamps may be independently adjusted, and adjusting devices on the outer. ends of said actuating members.

- 7. In combination with a plate cylinder having an axial bore extending outwardly through. its journal and having radial slots communicating with said bore; of plate clamps mounted in fixed pivots in said slots 1 and having arms projecting into said bore, and actuating members in said bore operatively engaged with the arms. I

8. In. combination with a plate cylinder having an axial bore extending outwardly I through its journal and having radial slots communicating with said bore; of clamping jaws pivoted in said slots and having arms projecting into said bore, concentrically arranged members in said bore operatively en gaged with difi'erent-respective jaws, and means. on the outer ends of said members whereflby the same may be independently ad- 'uste I 9. In combination with a plate cylinder having an axial bore extending outwardly through its journal and having radial slots communicating with said bore: of clamping jaws pivoted in said slots and having arms projecting into said bore, concentrically arranged members in said bore having their inner ends slotted and engaged with the respective jaws; and operative wheels on the outer ends of said members whereby same may be independently adjusted. 13o

ice

. 10. device for clamping stereotype plates to the cylinder of a printing press, comprising a jaw locatedwithin a slot in the cylinder and capable of being engaged ,with anddisengaged from aplate, and of being moved from plate engaging position,

in which parts thereof project beyond theperiphery of the cylinder, into a position in which' no part thereof so projects; witha aw'actuating member extending within andmovable longitudinally of the cylinder.

'11. A device for clamping stereotype plates to the cylinder of a printing press,

comprising a plurality of jaws distributedangular-1y" about the circumference of the cylinder and capable of being engaged with' and disengaged-from the plates, the said jaws being movable angularly in different paths radial in respect of the axis of the 'means on the outer end of said member.

cylinder,-: each of the jaws being operatively 13. Ina plate clamping device, the combination of a plate cylinder having a slot, an

axial bore, a jaw-pivoted in said slotand movable longitudinally of said cylinder, a longitudinally movable member disposed in said bore and engaging said jaws and adapted to rock the latter, andm'eans at the outer end of the cylinder for adjustingsaid member.

14.. In a plate clamping device, the combination of a plate cylinder having slots and a bore, plate clamps pivoted in said slots and movable longitudinally of said cylinder,-

ajplurality of longitudinally movable members in said bore engaging said clamps to rock same, and means for adjusting said members.

plate clamps pivoted in said slots and mov- 15. In a plate clamping device the combi-- nation of a plate cylinder having slots,

able longitudinally of said cylinder, a plu- J ralityof concentrically arran ed longitudinallv movable members para lel with the axis of the cylinder and extending through the journals thereof andyengaging diflerent clamps to rock-same, and means at the outer -en-ds'of the. cylinder for independently adjusting said actuating members.

1,6.In a plateclamping device the com-L bination of a plate cylinder having radial slots and a bore, plate clamps pivoted in said slots and movable longitudinally of said cylinder, a plurality 'of'longitudinally movable members parallel with the axis of the cylinder and within the said bore and engaging. difi'erent clamps to rock the lat-- .ter on their pivots, and means for independently. adjusting said actuating members from the outer ends of the cylinder.

17. In combination with a plate cylinderhaving a radial slot and an axial bore extending longitudinally through the cylinder journal, a radially disposed plate clamping jaw pivoted in said slot, and an actuating member extending longitudinally through the cylinder bore and having its having radial slots and an axial bore extend-- ing longitudinally through the cylinder journal, a plate clamping jaw-pivoted in each slot having an outwardly projecting plate. engaging member and an inwardly projecting'arm, andan adjustable longituinally movable actuating member in. said bore having its inner end operatively engaged with the jaw arms and adapted to rock same.

20. In combination with a plate cylinder having radial slots. and an axial bore extending longitudinally through the'cylin'-- der journal, a plate clamping 'jaw pivoted in each slot and having an outwardly projecting plate engaging member and an inwardly projecting arm, a plurality of Iongitudinally movable actuating members in said slot having their inner ends operatively engaged with the jaw arms to rock same, and adjusting devices on the outer ends of said members. p In witness whereof we have hereunto set our hands in the presence of two witnesses.

HERBERT PEARCE- THOMAS ROBERT GILLETT PARKER. ROBERT HENRY CARVERHILL.

Witnesses:

ER ALD' SIMPSON MOSELEY, v MALCOLM SMETHURST.

.inner end operatively engaged with the'inner 

